Glossary
Safety Engineering in SIMATIC S7
Glossary-8
System Manual, 04/2006, A5E00109529-05
F-Runtime Group
When the -> safety program is created, the -> F-blocks cannot be
inserted directly into tasks/OBs; rather, they must be inserted
into F-runtime groups. The safety program consists of one or two F-runtime group (S7
Distributed Safety) or several F-runtime groups (S7 F/FH systems).
F-Runtime License
-> F-CPU
F-SBs
S7 Distributed Safety: Fail-safe system blocks that are automatically called/inserted when
the -> safety program is compiled in order to create an executable safety program from the
user's safety program.
F-Shared DB
S7 Distributed Safety: Fail-safe data block that contains all of the global data of the -> safety
program and additional information needed by the F-system. When the -> safety program is
compiled, the F-shared DB is automatically inserted and expanded. Using the symbolic
name of the F-shared DB (F_GLOBDB), the user can evaluate certain data from the ->
safety program in the -> standard user program.
F-Simulation Blocks
S7 F/FH Systems: Block container of the Failsafe Blocks library that contains simulation
blocks. During offline simulation with ->
PLCSim, the -> F-blocks of the -> safety program are
overwritten by simulation blocks from the F-library with the same name.
F-SMs
F-SMs are signal modules of S7-300 that can be used for safety-related operation (in ->
safety mode) in S7 Distributed Safety or S7 F/FH Systems fail-safe systems. These modules
are equipped with integrated -> safety functions.
F-System Blocks
S7 Distributed Safety: Block container of the
Distributed Safety library containing the -> F-
SBs and the -> F-shared DB.
-> F-SB
F-Systems
-> Fail-safe systems
